Boiler furnace



(No Model.) ZvSheets-Sheet 1.

919.191.9191... -B OILER FURNAE.

(No Model.) y zsheets-sheet 2.

J. J. HALL.

BOILER PURNAGE'. No. 294,998. Patented Mar. 11, 14884.

A f UNITED STATES PATENT OFFICE.

JOSEPH J. HALL, OF CHICAGO, ILLINOIS, ASSIGNOR TO HALLS AUTOMATIC FEED BOILER FURNACE COMPANY, OF SAME PLACE.

BOILER-FURNACE.

SPECIFICATION lforming part of Letters Patent No. 294,998, dated'March 11, 1884.

Application filed August 13, 1883. (No model.)

To @ZZ whom, t may concern:

Be it known that I, JOSEPH J. HALL, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Boiler-Furnaces, of which the following, in connection with the accompanying drawings, is a specification.

In the drawings, Figure lis a front view of a furnace embodying my invention. Fig. 2 is avertical cross-section of the forward part of the furnace. Fig. 3 is a section in the plane of the line x Fig. 2. Fig. 4 is a detail, the same being a side view of a portion of the stoker; and Fig. 5 is a vertical cross-section through the same.

Like letters of referenceindicate like parts.

A A represent the furnace-walls, and Bis the boiler. C C are the retorts; D, the grate; and Eis the ash-pit. F is the ooking-oven. Gis the flame-chamber, and a a are passages through which it communicates with the retorts.

It will be perceived that the coking-oven and retorts are located in front of the boiler. It will also be perceived that I employ two retorts, separated, excepting as hereinafter explained, by a longitudinal wall, b, and that the coking-oven communicates with both retorts. These two retorts I employ in the example shown in connection with a single boiler; but the principal features of my present invention relate to the means employed for breaking up the coke and feeding it into the retorts, or depositing it upon the fire, and also to the means employed for supplying the retorts with air or oxygen. The bottom c of the coking-oven rests upon the wall b, and is slightly arched, by preference, as shown. The side walls, c c, are by preference somewhat flaring, as shown, being farthest apart at their lower edges. Between the lower edges of the walls c c' and the longitudinal edges of the bottom c are openings or spaces d d. In other words, these edges do not meet, and the coking-oven is so set into the furnace-walls that one opening d enters one of the retorts,

- plained.

door to one side and the other to the other side of the coking-oven, the doors being so arranged that one will overlap the other when closed. These doors, when open, I support in inclined positions, as indicated by the dotted lines atffof Fig. 2, so that they will serve as a hopper.

H is the breaker and stoker. This stoker consists of a shaft, g, having bearings in the front and rear ends of the coking-cha1nber, and in the front wall or arch of the furnace, as is clearly indicated in Fig. 3.

I I are fingers or crushers projecting from that part of lthe shaft g which is within the coking-oven. fingers polygonal, as represented, and to a-r- `range the corners or edges so that they will aid in breaking or crushing the coke when the shaft y is rotated or rocked for that purpose, as will hereinafter more fully be eX- I also deem it preferable to Vmake the ngers I I of different lengths, the longer ones alternating with the shorter, as shown in Figs. 3 and 4.

J is a lever or handle on the outer or eX- posed end of the shaft g.'

K is an air space or chamber' extending across the front wall of the furnace, and extending over the top of the furnace to and around the coking-o'ven, and thence along the sides and front and rear of the said oven, as indicated in Figs. Zand 3. The lower front part of this chamber entersV the ash-pit, and that part of the said chamber which surrounds the sides and ends of the ooking-oven enters the retorts C C.

L L are doors opening into the ash-pit, and L L are doors opening into the retorts. These doors may be perforated, as shown at h h, to permit air to pass from the chamberK into the retorts. M is a shaker for shaking the grate I).

In order 4to apply my improvements to use for the purposes for which they are intended, I proceed as follows: A fire being built in the retorts in the usual manner, I supply it thereafter with fuel by filling the cooking-oven with soft coal, the doors of the oven being opened and allowed to remain open while the furnace is in use. I also open either the doors L L or I deem it best to make these- IOO 9 Y sarees the dampcrs therein,in orderto suppl y the draft and air required to sustain combustion aml produce the required degree of heat. W'hile the fuel in the retort is being consumed, the coal in the eokingoven, or at least the lower portion thereof, becomes colied, and in becoming eoked swells out and clogs the openings el d, the coke and coal in the cohing-ovcn being thus suspended therein, but still subjected to the high heat in the retorts. IVhen more fuel is to be supplied to the incandescent or burning mass in the retorts, I vibrate or roel; the lever Jsufiiciently lo breal; up the mass of coke suspended inthe openings d d, and this broken coke then falls into the retorts, and is also pushed out ofthe coking-oven into the rctorts, as well as broken by the fingers I I, while the shaft g is rocked or rotated in the manner described. Theuncoked coal in the coking-oyen or its hopper then falls down, and in turn becomes celled, the intention being not-to allow the coking-o\'en or hopper to become empty while the furnace is in use. rihe doors lf" I", however, may be closed when it may be desired to allow the lire to burn out, or when the furnace is not in use. The air, in entering through the doors L Ihnot only passes through the grate, as usual, but also distributes itself through the chamber Ii, becomes heated to a greater or less degree, and passes into the retorts, thereby supplying those chambers with a sufficient supply of oxygen to sustain combustion. rIhe gases escaping from the retorts pass through the openings or passages a a into the chamber G, where the llames and heated cokingoyen F, the retorts C) C, and an airair produce a high degree of heat underneath the boiler, and, from thence the heat passes through the boiler-ilues and out in the usual manner, thus generating steam in the boiler.

It will be perceived from the foregoing description and from reference to the drawings that no doors need bc opened for the purpose of stoking, and hence that the fire will not be deadened by the entrance of a large volume of cold air. It will also be perceived that the fuel is colied before it is fed to the incandescent mass in the rctorts, and hence that it is better prepared for combustion without producing those line and, ileeey particles otl carbon which escape without being eonsumeihaud which are commonly designated as smoke It will also be perceived that the combustion will in all respects be more perfect or complete than in furnaces adapted to be fed or stoked in the usual manner. I also desire to call attention to the fact that the air-chamber K, besides supplying oxygen to the burning fuel, serves to protect the plates of the col;1 ing-oven from the effects of the intense heat produced, the said chamber performing the function also of a cooling-jacket, especially about those parts most exposed to heat.

A battery of two or more boilers may be stoked simultaneously, either by hand or by power, by connecting the levers .I (I, operating in connection with each stoker, and by actuating any one of the said levers.

Having thus described my invention, what I claim as new, and desire to secure by Letters Iatent, is-

l. rlhe combination, in a furnace, of the eoliing-oren l?, the retorts G C, and the rocking breaker and stokcr centrally pivoted, the said coliing-oven opening into the said retorts, and all arranged substantially as shown and described with relation to each other, for the purposes set forth.

2. The combination, in a furnace, of the coking-o\'en F, the retorts C C, and a stokcr and breaker centrally pivoted inthe said colo ing-chamber, and consisting of the rocking shaft f/, having thereon the lingers I I, and provided with an actuating lever or handle, substantially as and for the purposes set forth,

3. The combination, in a furnace, ot the chamber, li. the latter extending from the ashpit up the front ot' the furnace, thence over the front wall, and thence around the sides and ends ofthe eoking-oven,ai1d entering the said rctorts, substantially as and for the purposes specified.

In testimony that I claim thc foregoing as my own I here a llix my signature in presence of two witnesses.

JOSEPH il'. HALL.

Nitncssesz F. F. Vitamin, J. I. liiiriiNNY.

CID 

